Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.352.33-2.37
1
7.18
👆🏻
Fracture
Conchoidal
ConchoidalWalter Schumann
Cleavage
Perfect on {100}, imperfect on {001}
Perfect on {010}, good on {100}
Mohs Hardness
2.57.5
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Be 2BO 3(OH)Ulrich Henn and Claudio C.